Air-compressing machine.



A. L. ELLIS.

AIR GOMPRESSING MACHINE.

APPLICATION FILED MAR. 21, 1913.

1,109,519 Patented Sept. 1,1914.

noentoz itzi W851? 5% THE NORRIS PETERS CO.. PHOTO-L/THO.. WASHINGI'ON.u.

UNITED STATES PATENT OFFICE.

ALTOMON L. ELLIS, or EDEN, MISSISSIPPI.

AIR-OOMPRESSING MACHINE.

To all whom it may concern Be it known that I, AL'roMoN citizen of theUnited States, residing at Eden, in the county of Yazoo and State ofMississippi, have invented new and useful improvements in AirCompressing Machines, of which the following is a specification. a e v vAn object of the invention is to provide a machine for compressing air.

The invention embodies, among other feae tures, a casing subdivided toform a plurality of compartments, the medial one of which constitutes amain air chamber and which is provided withan outlet, a plurality ofpumps being" provided, the said pumps being of the double-acting typeand having connection with the medial chamber and the end compartmentsto force air into' the medial chamber and into the end compartthe endcompartcompress the, air in theinain air chamber,'the compression of theair in the main chamber beingregulated synchronously with the action ofthe pumps to force the said currentof air through the exhaust or-outletin the main chamber. a

In the further disclosure of the invention reference is to be had to theaccompanying drawings, constituting a part of this specification, and inwhich the figure is a horizontal longitudinal sectional view of thedevice, the pumps and operating mechanism therefor being shown in plan.

Referring to the figure it will be seen that use is made of acylindrical casing 10 includ- 7 ing a series of connected sections 10*and 10 with the section 10 interposed between the sections 10", suitablering-like plates 11 bebetween the ends of the middle section 10 and theend sections 10*. It will, therefore, be apparent that the section 10constitutes a main air chamber 12, whereas the end sections 1Oconstitute end air compartments 13.

A plurality of double acting pumps 14 are provided and actuated by asuitable driving member 15 interposed between the pumps as shown, andhaving connection with the said pumps are a plurality of pipeslfi-terminating in a pipe 17 having connection with the main air chamber12, an outlet 18 being pro vided for the chamber 12, as shown, to permglnterposed Specificationof Letters Patent.

L. ELLIS, a

PatentedSept. 1,1914.

Application filed March 21, 1913. Serial No. 756,062.

mit the air contained therein to flow outwardly from the chamber.

Compressing slide in the compartments 18 formed by the sections 10*, andabutting against integral circular flanges 2 10f the compressing heads19 are eXpansible helical springs 21 arranged within the compartments13, with the other ends I of the springs abutting against the innerfaces of end plates 22 secured to the outer open ends of the sections 10to close the same, it being readily apparent that the ring-1ike plates11 limit the forward movement of the compressing heads 19 and which arenormally held in forward position by the springs 21. Pipes 23 haveconnection with the compartments 18 and the pumps 14 for the purpose ofadmitting 8.116130 the compartments, behind the compressing heads 19, itbeing readily apparent by referring to the view that on the forwardstrokes of the plstons of the pumps 14, air will be forced through thepipes 23 into the end compartments 18, whereas on the return stroke ofthe pumps air will be forced through the pipes 16 and the pipe 17 .intO'the main air chamber 12. The compressing heads 19 are provided withopenings19" in which are mounted valves 25, consisting of circularcasings 26 in which are mounted to slide valve members 27 normallyengaged by springs 28 which tend to hold the valves 27in closed positionin the casing 26.

Now in order that the air passing through the outlet 18 from the chamber12 will .be

.of substantially an even pressure at all times so that a constantsupply of air will pass from the chamber, it will be apparentthat I, inorder to retain an even pressure of air in the chamber 12, thecompressing heads 19 will be moved by the air received in the chamberand against the actions of the springs 21 when the pressure of the airreceived in the chamber and forced therein by the pumps 14 is greaterthan the expansible action of the springs and it will be furtherapparent that when air is forced into the end compartments 13 throughthe pipes 23 connected with the pumps 14, the air received in the endcompartments will pass into the chamber 12 when the said air has agreater pressure than the expansible action of the springs 28 normallyholding the valves 27 in closed position. Therefore, each time that thepistons of the pumps 14 heads 19 are mounted to are moved forwardly bythe engine 15 a supply of air will be forced into each of thecompartments 13 and upon the return stroke of the pistons of the pumpsair will be forced into the main air chamber 12. Now

by providing the movable compressing heads and the valves 25 carriedthereby the pressure of the air in the chamber 12 will at all timesremain constant and therefore the air flowing outwardly through theoutlet 18 will at all times be maintained at an even pressure. I

- Having thus described my invention, 1 claim:

1. In a device of the class described, the combination withdouble-acting pumps, of a casing, plates secured in the casing to forman air chamber and end compartments therein, compressing heads mountedto slide in the compartments and adapted to engage the said plates tolimit the sliding movement of the heads in the compartments, springs inthe compartments and engaging the compressing heads to normally retainthe same in engagement with the said plates, pipes connecting the saidpumps with the said compartments, a pipe connecting the said pumps withthe said air chamber, an outlet pipe for the air chamber, andspring-engaged valves mounted on the said compressing heads to normallyclose openings therein.

2.111 a device of the class described, the combination withdouble-acting pumps, of a casing, plates secured in the casing to forman air chamber and end compartments therein, compressing heads mountedto slide in the compartments and adapted to engage the saidplates' tolimit the sliding movement of the heads on the compartments, springsinthe compartments and engaging the compressing heads to normally retainthe same in engagement with the said plates, pipes connecting the saidpumps with the said compartments, a pipe connecting the said pump withthe said air chamber, an outlet pipe for the air chamber, spring-engagedvalves mounted on the said compressing heads to normally close openingstherein, and apertured housings on the said heads and adapted to inclosethe said valves therein.

3. In a device of the class described, the combination with a casingsubdivided to form an air chamber and end compartments, of pumps havingconnection with the said air chamber and end compartments for forcingair therein, of compressing heads slidable in the endcompartments,,platessecured to the casing to limit the sliding move mentof the said heads and the said compartments, springs in the saidcompartments and engaging the ends to normally retain the same inengagement with the said plates, valves adapted to normally close,

openings in the said heads, and springs engaging the valves to normallyretain the same in closed position.

4. In a device of the class described, the combination with a casingsubdivided to form an air chamber and end compartments,

of pumps having connection with the said air chamber and endcompartments for forc- 111g air therein, of compressing heads slidablein the end compartments, plates secured to the casing to limit thesliding movement of the said heads and the, said compartments, springsin the said eompartments and engaging the heads to normally retain thesame in engagement with'the said plates, valves adapted to normallyclose openings in the said heads, springs engaging the valves tonormally retain the same in closed position, and apertured housings onthe said heads and adapted to inclose the said valves.

In testimony whereof I afiix my signature in presence of two witnesses.

ALTOMON L. ELLIS.

Witnesses:

W1. D. LAWSON, Gno. F. STRIOKLIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D.- CL

